Machine for shaping metal.



F. l. KOTZICH.

MACHINE FOR SHAPING METAL. APPLICATION FILED FEB. 24. 1916.

1,288,037. Patented Dec.17,1918.

4 SHEETS-SHEET 1.

F. L KOTZICH.

Patented Dec. 17,1918.

4 SHEETS-SHEET 2.

MACHINE FOR SHAPING METAL.

APPLICATION FILED FEB. 24, l9l6- 0 .0 Q O MN 4 F. J. KOTZICHi MACHINEFOR SHAPING METAL.

APPLICATION FILED FEB. 24, 1916.

- 4 SHEETS-SHEET 3- Patented Dec; 17, 1918.

F. l. KOTZICH. MACHINE FOR SHAPING METAL. APPuc/nmu FILED FEB-24.15MB.

Patented Dec. 17,1918.

4 SHEETS-SHEET L LII! lll il -l MQQQ Na 1. FQ

we es,

j En snares rams.

"amass. KoTzI'c-n; or 'cnicaeo, thinners, ASSIGNOB, o a. STEIN CHICAGO,ILLINOIS, "A CORPORATION.

& cantata, as

MACHINE on SHAPING METAL.

To all whom it mac concern Be it known that I, FRANK J, KOTY'Io'H, asubject of the Emperor of Austria HungarTy,

' residing in Chicago, county of Cook. and

State of Illinois, have invented certain. new and useful Improvements inMachinesfor .Shaping Metal, of which I do declare the following to be afull, clear, and exact description, reference being had to theaccompanying drawings, forming a part of this My present invention,while preliminarily designedto provide 'a machine for forming clasps ofmetal preferabl covered with a fabric (a sample of this type ofclasp'being shown in. Letters Patent No. l,l99,l-9l,-'dated' September26, 1916) is susceptible of a much wider application for the manufacture"of various other articles. The invention con.- sists in the novelfeatures of construction hereinafter described, illustrated in theaccompanying drawings and particularly pointed out in the claims at theend of this specification.

Figu're'l is a front view of amachine emwith fabric from which blanks,to be subsequently bent, may becut. F ig. 3 is a per spective viewshowing a blank that has been out and bent by my machine. Fig. 4 is aview on an enlarged scale in vertical section on line4= l of Fig. 1.Fig.5 is a view in vertical section similar to the left-hand portion ofFig. 4 but showing-parts in elevation. Fig. 6 is a detail perspectiveview of a plunger 'for ejecting" the finished blanks;

from the machine. Figs. 7, 8 9. and 10 are detail views in frontelevation showing more particularly the dies and die actuatingmechi'rnisms indifferent positions the cover "plate being'removedfl Fig.11 is a' view partly in sectionand partly in plan, on line 11-11 of Fig.1..Fig 12 is a detail view'in vertical section} on line 12-12 of Fig. 1.Fig. 13is a detail view in vertical section on line 13 13 of Fig. 1.Figgl iis view in vertical section on line 14-14: of Fig. 1 VAdesignates the main standard of the machine that is formed'preferablyof cast metal and is provided at its upper end with. an ex- Fig. 2 is aper-.

Smimm Letters Patent- 7 Patented Dec. 1 7.1919. Application filedFebruary 24, 1916. 3 Serial No. 80,130 m tension a. Through the .top ofthe standard A'and throughits extension at passes a shaft B, preferablyencircled by assuit'able bearing sleeve 6. Upon one end of the shaftB isloosely mounted "a drive pulley B. and between the'adja ent end of thestandard A and the pulley B is placed a suitable clutch whereby thepulley B maybe thrown into and out 'oftgear with the shaft B. As shown,-the clutch consist-s'of a sleeve actuated pawl '0.

this pawl'c being normally forced toward I engagement with teethcformedupon the adjacent-end of the hub of clutch forms no part of mypresent inven- 31011, I do not deem t necessary to describe it atgreater length, it belng sufiiclent to-"sa v that when the rod -0 isdrawn downward (as by a treadle.) the arm '0 will be moved downward inthe annular roove c of the sleeve 1( below thenotchc of the pawl 0 andthus will allow'the'pawl 0 to 10 k the pulley B to the shaft B. To theendof the extension a is fastened. as by screws d, a supporting plate orbracket D having at. its lower end an outwardly projectingfiange d" andhaving its lowerportion extended laterall as shown in Fig. 1, to supportthe feedmechanism" and adia ent parts. s Between the outwardlyprojecting portions d and d o'f'a block or plate D (see Fig. 11 securedto the front of the plate or bracket D is m unted the die mechanism bywhich 'theblanks' will be bent. The precise "character. ofthis dieniehanism may be varied in keeping with the/kind of work to be done, butI have shown the d e mechanism the form shown'in" Fig.3 of the drawings.Each of these blanks comprises a -U-shaped body port on E wi h inwardlvfolded. endse. The'blank may be formed of a strip of C that is fixed tothe shaft B, this sleeve carrying a springas comprising dies. adapted tobend blztfkSlO' metal E having a coveringe of fabric, as

- illustrated in Fig. 2, the edges of the fabric hesivejmaterial. g

-Upn'the flange or shelf al of the plate D is mounted a *female die Fthat may be held in place bya pin 1 (see Fig. 4:) and this die isfformedwith a-central recess f torec'eivethe blank aS..:1s finalbending iseriected. Each of the side walls of the temale die F is formedatits-top.witha seat 1 I "as the roll 25 enters the offset or concenf and with ashoulder f the purpose of which, as .--clearly shown by? Fig. 8,'-isr0300 operate with portions of themalejdie-in effecting the initialfoldingof the edges c of the blank i I Abovethe' teinaledie Fisinount'ed a male die that is'shown asconsistingof a plurality ofparts, v1z., aFcentral male d e G for ,1m-

.parting a U-shapedbend to the body o'fthe' blank E, side dies 9 foreffecting theinitial folding of the edges ofithe blank 'a'nd side" diesfor cooperating with the female die incompleting thefolding of theredgesof the blank, as clearly shown in FigflOof the drawing.;A suitablecover plate a (see 'Figs. 1 and 11) will retain the'dies within thechamber of the bracket D. The central "male die G is formed with anexpanded head 9 and about the upper portion of the shank of this die isset a coil spring H, the lower 2 I endof which bears upon'the pin Itthat passes through the stem. of the die Gr, while the upper end of-thespring presses against a shouldered portion20 (see Figs. L and 9)thatproj ects forwardly from the upper part c of the shank of the sidedies 9', being understood that these: dies 9' are shown as formed at thelower end of a U-shaped body (see Fig. 11) the upper portion ofwhich iscut away to admit the coil spring H (see Figs. 7 to 10). To. the upperportion20 of the body'of the side dies 9' is secured a pin 21 to whichis pivotally connected the lower hub of a link 22, the upper end of thislink .beingvpivotally mounted, as shown in Fig. 4, upon the outer end ofa wrist pin 23' that projects from a'cam wheel K keyed to the outer endof the main shaftB} When the cam wheel K is revolved, theiconnectionbetween thecam wheel and the upper portion 20 of the side male dies gwill cause the side male dies 9' to descend and at the same time willcause the central male'die G to descend because of the pressure exertedupon the stem of the die G from the coil spring H. .VVhen, however, thedie G'has' about reached the limit of its downward inovement, as shownin Fig. 9, the contlnuedrotation of the cam wheel K will .cause the sidedies g to move farther: downward, the coil spring H being compressed,as" shown in Fig. 10.. The purpose of this 'relative movevthe centralcavityofthe female die. order to eject the blank from the female die,

in Figs. 4; and 6 of the drawings. mechanism comprlses a plunger orejector ment ofithe central die G and the side male dies 9 is tocomplete the folding of the upper edges of the blank, as willfhereaftermore fully appear. 7 r e From the upper end of the shank or body portionof theside male dies g projects apm carrying a roll 25 that enters a camgroove 26" in the cam wheel K. The greater part ofthis cam groove 26 1sconcentric and while the roll 25 is within this concentric part of thegroove 26 no movement will be imparted to the dies 9. As soon, however,

trio portion 27 of the cam way, the dies 9 will be forced downward fromthe position shown in Fig. 7 to the position shown in strip E,thedescent of the side male dies g -will-causethe upward turning of theedges oftheblank'E, as shown iii-Fig. 8 of the drawings, after which thecontinued rotation of the cam wheel K will cause the withdrawal ofthedies 9, as shown in Fig. 9 of the drawings. 'By-referencemore'particulady to Figs. 7 to 10 of the drawings, the relativeoperation of the dies in forming the folded blanks will beseen tobe asfollows: The rotation of the cain'wheel Krfirst causes 7 the side maledies 9 to descend and to cooperate- With the seats f and shoulder f ofthe female die F in bending upward the edges of the blank, a's shown inFig. 8 of thedrawingsn As this bendingof the edges of the blank iseiiected and asthe side male dies 9 are retreating, the central maledieG dieG will force the blank E into the central cavity of the female dieand will impart aU shaped bendto the body of the blank. j Afterthecentral male die .G has reached the limit of its movement, the further'downward movement of the side male vdie gwill cause these dies topassfrom the -POSltlOD shown in .F 1g. 9 to the position shown in F1g.:1O-ofthe drawlngs, and in doing so they will complete the folding of theedges c of the blank E pas shown in Fig. 10.

When blank E has been folded, as shown in Fig. 10,-the continuedrotation of the cam wheel K will cause the link 22 to lift the centralmaledie-G and side male j-dies g to the position shown in Fig. 7 of the:drawings, leaving the folded blank E in In I, provide the. mechanismnext to be described and illustrated more, particularly This and thesidedies '9' will be moved'dowin ward by the link 22-, as shownin Figs. 8and 9 of the drawings, and the central male Lli2885037 l hl g lla-lfillgtt head m zconform ng..;ingeneral outline to the ,shape off the female;,die:1and this, head seats-normally within; a: recess 130 see; Fig. t)formed in the blockldDi that is bracket D. {The s'tem'fof the plunger Mpasses through theebl'Ook D and platev=D and i has 1 its L outer end:pivotally;, connected i .to Qa lever .pivotally mounted vupon a bracket36, the lowerend of this; lever: being forced normally away from theplate D .by a

spring .37 (see Fig. A). a Totthe:uppermend of the .Ileve1135 gislpivotallyncoimectedaa, rod 7 38 that passes through; the plateD, anditheend of:tl1e;r0di38 projectsaabeneathsthe;pe-' ripheryzof. the cam.wheelrK. :By; reference l i to Figs.;5,,z7, and, 10 of: the drawings,it.will

' .be'seen-that u Onvthe peri-phery'of thewc-am wheel K is formed sanxinclined or camshaped rib 39 4 and the purpose of this rib 39. is to;contact-Jwith; the end of'zthe rodl38 and causeEthis rod to movebackward so-as-to ulllOVG. the lever and theplunger M :i-from theposition shownlby;full lines in Fig et'to r the. position v shown I by.fdottedi lines iTliis operation of. the ejector mechanismrbytthe.

A campplate or. ribl39 willioccur shortly-after :v the male dies thus:operated, '1' the folded blanks =.will he thrown outward throughthe-opening y tin ithefifront plate {(see' Fig.' 1 When the pin: 38escapes flOlIl contact with the cam 11% P 5 P I retract the plunger tthe pasit Shown fuu "lines in Fig .-4 V p l At'the f feed =side the maledies ar- 7 ranged. ai'knife O',"the lower sharpenedend of which--coop'erates with a blade O' In we formthe 'folded blanksl E. As shown,

severing the strip "E into pro er lengths the knife is secured 'to' thea side of the the blade 0' will be seen that the severing of the stripwill occur immediately before the dies come into action.

In order to direct the strip" E accurately to position over *the femaledie E",

I employ f the I yielding guide next to? be dosribe'd. Asshown,this-guidecomprises a channel-shaped plate P having upper andlower members between which will be "fed the strip E of material fromwhichi the -bl rinks-are to be formed. The guide PIis-pivotec by meansof a: pin 40,; to an arm 41 that is fixed upon the guide rodslQaIid $43,

the f ends of rods being mounted re spec-tively insockets formed in theside 32, to themplate or tends into the path ofithe end and 14)have::been retra'etedfromgthe v female die. When the ejector mechanismis block having raised slots 63lthrough which will pass the strip "15."From the block160 projects apivot pin R, the strip E barsd and in thebracketet5that isifastened to. and projects forward from the extension dofthe plate D (see Figs. 1 and 11). By reference more particularly toFigs? to 10 of the drawings, it will be seen that the lower member ofthe. guide P exof the knife 0, although notquiteso far as the knife 0.

-' Hence, when the knife 0; descends to sever the strip E it will forcedownward the strip-andthe free end of theguide,the guide turningwaboutits pivot 40. 'In order to restoreithe guide and the;.strip-' toposition to enable the strip to be accurately fed between the dies, Ipreferably employ a coil spring-5O mountedvupon' the rod 43, this springhaving its lower end '51- extending beneath-the" free end of the guideP, while the opposite end ofv the spring is turned upward and intoengagement with the "rod fed' between" the knives and I the d188- Inorder to fee'di the strip E, I prefer to employ the-mechanism next to bedescribed.

Uponthe rods 42 an'd 43" is mounted arslid- --ing'sblockor ';=carrier'60 (see Figs. 1, l1 and 13 'of thedrawings). To thelower end :of thissliding block orearrier'60 is secured, as

42(see Figs. 1; Hence, it will be seenthat after the-knives O and '0'havesevered" thestlip and the' knife O recedes, thespring 50-will causethe guide =1? -"-to move upward and bring the "free --endxof the "Strip'-E into proper position to be by-a screw.6l, 'a guide -62 consisting ofa portions provided with 65 on which is'mounted a feed pawl R, the

lower "end' of; this pawl extending between the raised portions of the.guide block 62 and insu'ch. position that when the block 60 is movedforward, carrying with it the pawl will be advanced .a' distancecorresponding to the travel of the block" 60. I coil spring 67 mountedupon the pivot pin 65.has a bent lower end engaging the "lower'end ofthe pawlR andthe bent upper end'secured to the block ,60,

this spring'serving-to force the pawl R'downward nto engagement withthestrip E. Inorderto' slidetheblock 60 backand forth for the purpose ofcausing the pawl R to feed the strip "E, I-projectapi-n'fiS from thebackof the blockl60-into-a slot 69 formed at the'lower end'of arockinglever '70that is 'pivotally mounted :upon a stud 71 projectingfrom the front ofthe plate D. The upperarni 72of the lever "70*(see Fig.12) is provided with a pin carrying a friction roll 73xadapted'to beengaged by a cam 74 formed'uponthe 'periphery'of the cam wheel K. Hence,it will -be seen that when in the revolution "of Y the cam wheel thecam74 strikesthe "fr cnon-r611 73 of-the upperend of *the lever70,

- the rocking ofthe'lever 7t) will cause the ,block 60 to slide alongthe rods 42 and 43 carrying with it the 'pawl'R and, thus admechanismshown more particularlyinFig. 12 of the drawlngs. Thismechanlsm come lvancing the strip E? along the guideway P and between. the male andfemale dies. "In orderf'to retract theiblock 60 and the pawl 11,1 prefertoemploy the adjustable spring prises a coil spring 75 that, encirclesthe stud 7 1.: The innerend of this spring 75 is secured within a socketformed ini the hub Ofzjthe rocking lever 70, while the outer end of-{thecoil spring is secured within a socketformed ina sleeve 7, 6 slippedover the [end of the stud71 and inclosin'g'the coil ,springThroughtheend of, the sleeve 76 passes a screw '77 that enters athreaded seat in the end of the stud 71. The outer surfaceof the sleeve7 6 is preferably milled orroughened so that by turning the sleeve- 76the desired tension may be given {to the inent of the sleeve f coilspring 7 5 for properly retracting the rocking lever 70; and when thespring 75 is placed under proper tension by turning .the screw 7, theend of the sleeve 7 6 will be firmly jammed against the end of the stud"71, thereby preventing any backward movetension. of the spring. Y

being arranged above a guide 1 62 corresponding to the guide 62 beneatlithe feed .55 Q parted to-the strip E, but if it iszdesired adjustingpawlR. Upon the pin 89 on which the f check pawl S is pivotedisarrangedacoil spring 81-similar to the-coil'spring'fifl here- I inbe'foredescribed, and serving torfor'cethe free end of the check pawl S-downward onto the strip E as. it passes over the guide-62". I i f :Inorder to determine the extent; of feed imparted to thestripE by the feedpawl R,I provide'an adjustingscrew'85 (see Figs. l and 11) that-passesthrough a threaded 'holef in the block 45. InFig. 1, the feed pawl R andthe block are shownrat the limit of I "theirbackwardmovement and theblock 60 g asf contacted with the end of the adjusting screw 85 and"also with a stop sleeve' 86 to feed the strip E for shorter blanks, the

When themetal strip E is c'arried upon a reel T lfprefer to mount thisreel upon a supportingiarm Q'Othatis pivotedto a stud 9 1,projectingoutward from the extension 7-6 that would relax the screw 85will be :turned forward so as to limit the backward movement ofthe feedpawlR. r

of'theplate'or bracket D. The free end of theqarm; '90; carries a pin 92that passes through'thehead of the'reel T, a'sleeve '93 provided-with aset screw 94 serving to hold the 'reelxT revolubly' upon the pin'92. Thestrip E ',]being "coiled upon the reel T, is curved -'andthe degree ofcurvatureof the stripis greater in that part'of the strip that iscoiledaround the centralportion of the reel. It is desirable 'to take the bendor curve out of that/part of the strip that is nearest thecentrallpartfofthe reel, and to this end I provide the straighteningmechanism next to be described. "Upon a bracket95 (see Fig. 11);securedto the plate D are mounted a pair of straighteningrol'ls 96 beneathwhich the strip E will pass and below the-rolls 96 'isathirdstraighteningroll 97 that-is mounted-upon a stud projecting inwardlyfrom the supportingarm '90. To the supporting arm 90 is.:.pivotallyconnected the bifurcated lower end of an adjusting rod 98 that passesthrough- ,a sleeve 99 projecting from the bracket 95o-(see Figs. 1 and11), and upon "this adjusting 'rod s mounted a coil: spring 100thetension of whichcan be adjusted by -mean'ssoffa thumb nut 101. thatis mounted 1 upon tlieupper end of the rod" 98. When jtheZreelQT isfull,'there is comparatively littlecurvature in thestrip E- and this canbe readilyremove'd by passing the strip belowtheltw o straighteningrolls 96' but as thestrip E is drawn'oif the reel, it lsfound thattheportic m of the strip adjacentthe centraljpartlof the reel is moresharplbent and ito straighten this part ofthe strip the lower straighteningroll 97-shouldbebrought into action, Thepurpose ofthe adjusting screw98jis to 'enablethe lower straightening jca lly ,Thus, itwi l be seenthat iftheten- 7 sion of the sprin IOObe-prO erlyadjusted for thefullreel T, the rolls 96 and 97 will be "separated, as shown in Fig.1,as the initial portionof the strip is drawn from the reel ;,but' asthestrip .is drawnoff and the ,weight of'the reeldecreases, thesupporting arm; 90; willtris'euntil the straightening roll *97isgbrou'ght tobear uponthe under side of strip.-

;Vhil e I have described what I, regard as .o the preferred embodimentof 'my invention, I it willbe understood that the details ofconastruction aboveset out may be varied with .outdeparti'ng fromthe-scope of the invention and thatfeatures of the invention may beemployediwithout itsoadoption as anen- .tirety';

; I claim a'new and desire to secureby Let- -ters' Patent-is:5rL, i p

1;}Inamachine of the character described, the combinationwith means forfeeding a roll97 tobe brou ht into action automati-.

thestrip E and willaid in straightening the v :Havingtliiis describedinvention, what blanks, of means for first partially bending thefendportions of said blanks, means for next imparting a U-shaped bend tothat part of .each blank betweenthe partially bent ends to bring theedges of said ends adjacent each other, and means for finally foldinginwardly the partially bent ends of the blank onto the inner face of thebody of the blank.

2. In a machine of the character described,

thecombination with means for feeding a covered metal strip and cuttingit into blanks, of a central male die and side male dies arrangedalongside said central male die, a female die recessed to receive saidcentral and side male dies, and means for forcing said central and sidemale dies successively into said female die,'said dies being so shapedas to impart a U-shaped bend to the body of each blank and to foldinwardly the ends of the blank onto the inner face of said body.

3. In a machine of the character described, the combination with meansfor feeding a covered metal strip and cutting it into blanks, of afemale die having a deep central recess and having a recess above and ateach side of said central recess, a central male die and side male diesarranged to en ter said central recess, other side male dies adapted toenter the recesses at the side of said central recess, and means forsuccessively operating said male dies to first impart an initial bend tothe ends of each blank and afterward impart a Ushaped bend to the bodyof the blank and fold inwardly the initially bent ends onto the innerface of the body of the blank.

4. In a machine of the character described, the combination with meansfor feeding a strip,-of means for severing said strip into blanks, afemale die, a central male die, a

pair of independently operable side male dies at each side of saidcentral male die, and means for successively operating the outermost ofsaid side male dies, the central male die and the innermost of said sidemale dies to first partially fold the ends of each blank. then impart aU-shaped bend to the body of the blank and finally complete the foldingof the partially folded ends of the blank upon the inner face of thebody thereof.

5. In a machine of the character described, the combination with meansfor feeding a strip, of means for severing said strip into blanks, astationary female die having a central deep recess therein to impart aU- shaped bend to the body of each blank and havlng at the sides of saidcentral recess Walls provided each with a seat at its top for thepartial upward folding of the ends of said blank, a central male dieadapted to force the body of the blank into the deep recess ofthe-female die, relatively movable side male dies for forcing the ends:of said blank into said seats at the top of the walls of the female dieto bend upwardly the ends of said blank, and'means for reciprocatingsaidside male dies that bend the. ends'rof the blank in advanceof-thereciprocation of the central male die. V r

, 6. A machine for forming a channelshaped body having its ends foldedinwardly toward each other, comprising a single-female die having a deepcentral recess for imparting a bend to said body and having at each sideof said central recess a recess and a male die adapted to impart aninitial upward bend to the corresponding end of said body, and male diemechanism having a central portion adapted to force said body down intosaid central recess and having side portions movable relatively to saidcentral portion and adapted to complete the folding of the ends of saidbody inwardly onto said body. a

7. A machine of the character described, comprising a female die havingadeep central recess therein to impart a U-shaped bend to the body of ablank and having at the sides of said central recess stationary wallsprovided each with a should'r at itstop and with an upstanding lipoutside said shoulder, a male die provided with a central portionadapted to force the body of each blank into the deep recess of thefemale die and provided with side portions movable relatively to saidcentral portion and adapted to turn upward the ends of the blank and toforce the ends of said blank downward and inward against the inner faceof said blank.

8. A machine of the character described, comprising a female die havinga deep central recess therein to impart a U-shaped bend to the body of ablank and having at the sides of said central recess stationary wallsprovided each with a shoulder at its top and with an upstanding lip atthe outer portion of said shoulder, male dies formed of separablymovable parts and having outer side portions forturning upward the endportions of said blankand provided with other portions between said sideportions adapted to force the body of the blank down and into the deeprecess of the female die and to complete the inward folding of the endsof the blank against the body thereof, and means for reciprocating saidouter male dies in ad-, Vance of the reciprocation of the male dieportions between them.

9. In a machineof the character described,

the combination with mechanism for feeding mechanism, a spring forsustaining said sup porting means, and a screw for ad ustingthe tensioof. said spring whereby the pressure of'the straightening mechanism willbe increased as the Weight'of the coiled spring decreases. v I

the coiled strip decreases'the pressureof the straightening means willbe increased.

10. In a machine ofthe character described,

' the combination with mechanism for feeding 5 a metal strip, of meansfor straightening the I strip located in advance of said feedingmechanism, a support for the coiled strip located in advance of said.straightening I i FRANK KOTZICH.

copies of this patentmay be obtained for fire cents each, by addressingthe Commissioner of Patents,

Washington, D. C. I

